A clock repairman named Julien (Jerzy Radziwilowicz), for reasons unknown, is blackmailing a woman known only as Madame X (Anne Brochet). He is also in love with Marie (Emmanuelle Béart), whom he once met at a party and has dreamed of ever since. When they bump into each other in the street, she too is keen to renew their acquaintance and soon moves into Julien's rambling old house. Slowly, it becomes apparent that there's something strange about Marie. Madame X helps Julien realize that he has to uncover Marie's secret—and in so doing, face losing her. In French with English subtitles.